Hubungan Pemupukan dan Kemiringan Lahan terhadap Produktivitas Kelapa Sawit (Elaeis guineensis jacq) di PT Perkebuanan Nusantara IV Unit Pabatu

Abstract

This study aims to determine the effect of fertilization and land slope on oil palm productivity at PT Perkebunan Nusantara IV Pabatu unit in Serdang Berdagai Regency, North Sumatra, conducted from May 2023 to June 2023. This study uses secondary data available in the plantation administration, including productivity data in 2015, 2016, 2017, 2018, 2019, 2020, 2021, and 2022, NPK and Mg fertilization data in 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, and land slope data taken directly. The analytical methods used were multiple linear regression analysis and correlation analysis. The model was tested for feasibility with classical assumption tests including normality, heteroscedasticity test, multicollinearity test, and autocorrelation test using SPSS.v.22 for windows statistical tools. The results showed that NPK and Mg fertilization had no significant effect on increasing oil palm productivity. Land slope has a real effect on increasing the productivity of oil palm productivity with the more land approaching flat conditions (0°) the higher the productivity of oil palm produced. The correlation of NPK and Mg fertilization has a weak influence in achieving oil palm productivity. The correlation of land slope has a significant effect on oil palm productivity.